The V-22 Osprey is the first production aircraft that can switch between flying as a plane and a helicopter. This tiltrotor aircraft has had a turbulent history but could very well be the future of aviation.

As we've evolved, the human stress response has saved our lives. Today, we turn on the same life-saving physical reaction to cope with intense, ongoing stressors. This documentary looks at the role this plays in our day to day existence.